[INFO] updating cached repository GovTechSG/chkr
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/GovTechSG/chkr
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/GovTechSG/chkr" "work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/GovTechSG/chkr"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/GovTechSG/chkr'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/GovTechSG/chkr" "work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/GovTechSG/chkr"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/GovTechSG/chkr'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 767e4218499563f16683fc0b38f3e6505ef80480
[INFO] sha for GitHub repo GovTechSG/chkr: 767e4218499563f16683fc0b38f3e6505ef80480
[INFO] validating manifest of GovTechSG/chkr on toolchain master#6ecad338381cc3b8d56e2df22e5971a598eddd6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of GovTechSG/chkr on toolchain try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing GovTechSG/chkr
[INFO] finished frobbing GovTechSG/chkr
[INFO] frobbed toml for GovTechSG/chkr written to work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/GovTechSG/chkr/Cargo.toml
[INFO] started frobbing GovTechSG/chkr
[INFO] finished frobbing GovTechSG/chkr
[INFO] frobbed toml for GovTechSG/chkr written to work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/GovTechSG/chkr/Cargo.toml
[INFO] crate GovTechSG/chkr has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking GovTechSG/chkr against master#6ecad338381cc3b8d56e2df22e5971a598eddd6c for pr-57501
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57501/worker-5/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/GovTechSG/chkr:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8715ab5a0c87283b269614cc670dfcc530e64daac1bb09d0d073e36c2bdd18f8
[INFO] running `"docker" "start" "-a" "8715ab5a0c87283b269614cc670dfcc530e64daac1bb09d0d073e36c2bdd18f8"`
[INFO] [stderr]     Checking csv v0.14.7
[INFO] [stderr]     Checking docopt v0.6.86
[INFO] [stderr]     Checking chkr v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.43s
[INFO] running `"docker" "inspect" "8715ab5a0c87283b269614cc670dfcc530e64daac1bb09d0d073e36c2bdd18f8"`
[INFO] running `"docker" "rm" "-f" "8715ab5a0c87283b269614cc670dfcc530e64daac1bb09d0d073e36c2bdd18f8"`
[INFO] [stdout] 8715ab5a0c87283b269614cc670dfcc530e64daac1bb09d0d073e36c2bdd18f8